That Right Folks... The Etymotic Line of IEMs is one of the Most Tunable IEMs on the market.
Simply by changing the filters, You Too Can Increase the Bass Response.
A little known fact that is now exposed.
I have simply changed the filters/increased their resistance and turned my Etymotic MC5s into BASS MONSTERS!!!
More reading can be done here: http://rinchoi.blogspot.com/2012/08/the-effect-of-acoustic-dampers-on-iems.html
The filters/acoustic dampers can be purchased here: http://www.mouser.com/Electromechanical/Speakers-Transducers/_/N-wp8t?P=1z0z39l&Keyword=knowles+dampers&FS=True
I hereby name this, The NRB Mod...
Go for it and make the most of a great IEM!!!
SIGNED: Jim, "The NRB Mod-Father"
Added Filter changing info:
About the Filters
Etymotic Earphones have special filters that smooth the frequency response and prevent earwax from entering the earphones. A filter is located at the end of the earphone and is visible when the eartip is removed. If a filter becomes clogged, it should be replaced. A dirty filter will reduce earphone output. A filter should be changed if the loudness decreases or the sound quality declines.
Note: Filters are not reusable.
RemovalNote: Use the tool to remove the filter.
ReplacementNote: Do not use the tool to replace the filter.
Added Filter Info:
Etymotic stock filter/damper specs:
IEM Model / Knowles part no. / Color / Resistance value
MC3 & MC5 / BF-1859 / White / 680 ohm
HF3 & HF5 / BF-1861 / Green / 1500 ohm
ER-4 (all models) / BF-1861 / Green / 1500 ohm
My further suggestion is to increase at least two values above the stock filter.
An example would be what I have done with my MC5.
I have taken the Stock filter (white 680 ohm) out, and replaced it with a green 1500 ohm filter.
Of course you could increase it further if desired.
And you could also reduce it too.
All Filter Specs are here:
BF-1999 Grey 330 ohm
BF-1859 White 680 ohm
BF-1860 Brown 1000 ohm
BF-1861 Green 1500 ohm
BF-1921 Red 2200 ohm
BF-1922 Orange 3300 ohm
BF-1923 Yellow 4700 ohm
Edited by AstroTurf - 9/10/12 at 4:39pm